What was found
GSO - FLT 3346 - CREW REPORTED THAT IN-FLIGHT, THEY RECEIVED A LEFT DUCT LEAK AURAL WARNING, AIRCRAFT RETURNED TO FIELD WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED A DUCT TEMP SENSOR IAW EMB-120 MM 20-21-00, OPERATIONAL CHECKS WERE SATISFACTORY. AIRCRAFT RELEASED FOR SERVICE. (X)